TY - JOUR
T1 - Atomic Magnetic Heating Effect Enhanced Hydrogen Evolution Reaction of Gd@MoS2 Single-Atom Catalysts
AU - Zeng, Wei
AU - Jiang, Zhenzhen
AU - Gong, Xunguo
AU - Hu, Ce
AU - Luo, Xingfang
AU - Lei, Wen
AU - Yuan, Cailei
PY - 2023/1/25
Y1 - 2023/1/25
N2 - Atomic heating on single atoms (SAs) to maximize the catalytic efficiency of each active site would be a fascinating solution to break the bottleneck for the performance improvement of single-atom catalysts (SACs) but highly challenging task. Here, based on the Gd@MoS2 SACs synthesized by a facile laser molecular beam epitaxy method, high-frequency alternating magnetic field (AMF) technology is employed to induce atomic magnetic heating on Gd SAs that is meanwhile demonstrated to be the catalytic active center. Significant improvement in catalytic kinetics under AMF excitation (3.9 mT) is achieved, yielding a remarkable enhancement of hydrogen evolution reaction magnetothermal-current by approximate to 924%. Through theoretical calculations and spin-related electrochemical experiments, such promotion in catalyst activity can be attributed to spin flip (or canting) in Gd SAs leading to the atomic magnetic heating effect on catalytic active center. Together with the embodied high stability, the implement of AMF to the SAs field is demonstrated in this work, and the precisely atomic magnetic heating on specific SAs offers unprecedented thinking for further improvement of SACs performance in the future.
AB - Atomic heating on single atoms (SAs) to maximize the catalytic efficiency of each active site would be a fascinating solution to break the bottleneck for the performance improvement of single-atom catalysts (SACs) but highly challenging task. Here, based on the Gd@MoS2 SACs synthesized by a facile laser molecular beam epitaxy method, high-frequency alternating magnetic field (AMF) technology is employed to induce atomic magnetic heating on Gd SAs that is meanwhile demonstrated to be the catalytic active center. Significant improvement in catalytic kinetics under AMF excitation (3.9 mT) is achieved, yielding a remarkable enhancement of hydrogen evolution reaction magnetothermal-current by approximate to 924%. Through theoretical calculations and spin-related electrochemical experiments, such promotion in catalyst activity can be attributed to spin flip (or canting) in Gd SAs leading to the atomic magnetic heating effect on catalytic active center. Together with the embodied high stability, the implement of AMF to the SAs field is demonstrated in this work, and the precisely atomic magnetic heating on specific SAs offers unprecedented thinking for further improvement of SACs performance in the future.
KW - alternating magnetic field
KW - atomic magnetic heating effect
KW - hydrogen evolution reactions
KW - single atoms
KW - PRINCIPLE
UR - http://www.scopus.com/inward/record.url?scp=85142901839&partnerID=8YFLogxK
UR - https://www.webofscience.com/wos/woscc/full-record/WOS:000890354300001
U2 - 10.1002/smll.202206155
DO - 10.1002/smll.202206155
M3 - Article
C2 - 36437043
SN - 1613-6810
VL - 19
JO - Small
JF - Small
IS - 4
M1 - 2206155
ER -